package com.ruoyi.common.security.service;

import com.ruoyi.common.core.constant.CacheConstants;
import com.ruoyi.common.core.constant.SecurityConstants;
import com.ruoyi.common.core.utils.JwtUtils;
import com.ruoyi.common.core.utils.ServletUtils;
import com.ruoyi.common.core.utils.StringUtils;
import com.ruoyi.common.core.utils.ip.IpUtils;
import com.ruoyi.common.core.utils.uuid.IdUtils;
import com.ruoyi.common.redis.service.RedisService;
import com.ruoyi.common.security.utils.SecurityUtils;
import com.ruoyi.system.api.model.LoginUser;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import javax.servlet.http.HttpServletRequest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

/**
 * token验证处理
 *
 * @author ruoyi
 */
@Component
public class TokenService {
  @Autowired private RedisService redisService;

  protected static final long MILLIS_SECOND = 1000;

  protected static final long MILLIS_MINUTE = 60 * MILLIS_SECOND;

  private static final long expireTime = CacheConstants.EXPIRATION;

  private static final String ACCESS_TOKEN = CacheConstants.LOGIN_TOKEN_KEY;

  private static final Long MILLIS_MINUTE_TEN = CacheConstants.REFRESH_TIME * MILLIS_MINUTE;

  /** 创建令牌 */
  public Map<String, Object> createToken(LoginUser loginUser) {
    String token = IdUtils.fastUUID();
    Long userId = loginUser.getSysUser().getUserId();
    String userName = loginUser.getSysUser().getUserName();
    loginUser.setToken(token);
    loginUser.setUserid(userId);
    loginUser.setUsername(userName);
    loginUser.setIpaddr(IpUtils.getIpAddr(ServletUtils.getRequest()));
    refreshToken(loginUser);

    // Jwt存储信息
    Map<String, Object> claimsMap = new HashMap<String, Object>();
    claimsMap.put(SecurityConstants.USER_KEY, token);
    claimsMap.put(SecurityConstants.DETAILS_USER_ID, userId);
    claimsMap.put(SecurityConstants.DETAILS_USERNAME, userName);

    // 接口返回信息
    Map<String, Object> rspMap = new HashMap<String, Object>();
    rspMap.put("access_token", JwtUtils.createToken(claimsMap));
    rspMap.put("expires_in", expireTime);
    return rspMap;
  }

  /**
   * 获取用户身份信息
   *
   * @return 用户信息
   */
  public LoginUser getLoginUser() {
    return getLoginUser(ServletUtils.getRequest());
  }

  /**
   * 获取用户身份信息
   *
   * @return 用户信息
   */
  public LoginUser getLoginUser(HttpServletRequest request) {
    // 获取请求携带的令牌
    String token = SecurityUtils.getToken(request);
    return getLoginUser(token);
  }

  /**
   * 获取用户身份信息
   *
   * @return 用户信息
   */
  public LoginUser getLoginUser(String token) {
    LoginUser user = null;
    try {
      if (StringUtils.isNotEmpty(token)) {
        String userkey = JwtUtils.getUserKey(token);
        user = redisService.getCacheObject(getTokenKey(userkey));
        return user;
      }
    } catch (Exception e) {
    }
    return user;
  }

  /** 设置用户身份信息 */
  public void setLoginUser(LoginUser loginUser) {
    if (StringUtils.isNotNull(loginUser) && StringUtils.isNotEmpty(loginUser.getToken())) {
      refreshToken(loginUser);
    }
  }

  /** 删除用户缓存信息 */
  public void delLoginUser(String token) {
    if (StringUtils.isNotEmpty(token)) {
      String userkey = JwtUtils.getUserKey(token);
      redisService.deleteObject(getTokenKey(userkey));
    }
  }

  /**
   * 验证令牌有效期，相差不足120分钟，自动刷新缓存
   *
   * @param loginUser
   */
  public void verifyToken(LoginUser loginUser) {
    long expireTime = loginUser.getExpireTime();
    long currentTime = System.currentTimeMillis();
    if (expireTime - currentTime <= MILLIS_MINUTE_TEN) {
      refreshToken(loginUser);
    }
  }

  /**
   * 刷新令牌有效期
   *
   * @param loginUser 登录信息
   */
  public void refreshToken(LoginUser loginUser) {
    loginUser.setLoginTime(System.currentTimeMillis());
    loginUser.setExpireTime(loginUser.getLoginTime() + expireTime * MILLIS_MINUTE);
    // 根据uuid将loginUser缓存
    String userKey = getTokenKey(loginUser.getToken());
    redisService.setCacheObject(userKey, loginUser, expireTime, TimeUnit.MINUTES);
  }

  private String getTokenKey(String token) {
    return ACCESS_TOKEN + token;
  }
}
